Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 404 · 40 questions

What you do (Only the length matters): 1. Tie the nut to the string and hang it from the taped pencil, 30 cm long. 2. Pull it a little to one side and let go — do not push. 3. Time 10 swings and divide by 10. 4. Change only the string length (60 cm), time 10 swings again, and stand back from the bob.

1. 1.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) one swing is too slow (c) 10 is a lucky number (d) it is more fun
2. 2.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
3. 3.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
4. 4.True or false: a string is not needed for the pendulum. (a) True (b) False
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
6. 6.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a stopwatch (c) turmeric powder (d) a string
8. 8.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 7 seconds?
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is kept the same. (a) False (b) True
10. 10.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
11. 11.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 26 seconds?
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) True (b) False
13. 13.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we measure it (c) we change it
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
16. 16.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
17. 17.True or false: yeast is not needed for the pendulum. (a) True (b) False
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
20. 20.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a heavy brick (d) a sharp tool
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) how far we pull it back (c) the string length
22. 22.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
23. 23.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a stopwatch (c) a string (d) a ruler
24. 24.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is magnetic (c) it is hot (d) it is wet
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we change it (c) we measure it
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the string length (c) the weight of the bob
27. 27.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
28. 28.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
29. 29.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) about the same (c) much faster (d) much slower
30. 30.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it becomes 4 times (d) it stays the same
31. 31.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 38 seconds?
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “how far we pull it back”? (a) we change it (b) we measure it (c) we keep it the same
33. 33.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) time for 10 swings (c) how far we pull it back (d) the weight of the bob
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) False (b) True
36. 36.True or false: a magnet is needed for the pendulum. (a) True (b) False
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) True (b) False
38. 38.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a balloon (c) turmeric powder (d) a stopwatch
39. 39.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) yeast (d) a pencil and tape

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